63679944997609 has 2 divisors, whose sum is σ = 63679944997610. Its totient is φ = 63679944997608.

The previous prime is 63679944997511. The next prime is 63679944997661. The reversal of 63679944997609 is 90679944997636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35794912923225 + 27885032074384 = 5982885^2 + 5280628^2 .

It is a cyclic number.

It is not a de Polignac number, because 63679944997609 - 2¹⁷ = 63679944866537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63679944997609.

It is not a weakly prime, because it can be changed into another prime (63679944997679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31839972498804 + 31839972498805.

It is an arithmetic number, because the mean of its divisors is an integer number (31839972498805).

Almost surely, 2^{63679944997609} is an apocalyptic number.

It is an amenable number.

63679944997609 is a deficient number, since it is larger than the sum of its proper divisors (1).

63679944997609 is an equidigital number, since it uses as much as digits as its factorization.

63679944997609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29998781568, while the sum is 88.

The spelling of 63679944997609 in words is "sixty-three trillion, six hundred seventy-nine billion, nine hundred forty-four million, nine hundred ninety-seven thousand, six hundred nine".